[Elecraft] Lost tuning range on 40m

[Don Wilhelm]

Ignacy,

There is nothing actually band sensitive in the KXAT1, other than there 
is a unique L and C combination that would be used for any given antenna.
Might I suggest that you look carefully to see what might have changed 
with your antenna.  I believe that is the most probable answer.
You might also check the toroids in the KXAT1 - there could be one that 
has a poorly tinned lead but worked OK for a while.
You could also verify that all relays operate by operating each relay 
using the L0-L3 and C0-C3 along with NT1 and NT2 settings in the ATU 
menu - check the relays for continuity across the closed contacts after 
operating them.  You will have to lift one leg of L1-L3 to check those 
relays for continuity.

73,
Don W3FPR

Ignacy wrote:
> Lately ATU in my KX1 lost ability to tune on 40m well. It reduces SWR but not
> as good as before. 30 and 20m are OK. Is there anything special to look at?
> Ignacy
>